THE EFFECT OF WAVE IMPEDANCE ON HUMAN WHOLE-BODY RADIOFREQUENCY ABSORPTION RATES

Authors
  1. Hill, D.A.
  2. Walsh, J.A.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
Human volunteers were exposed to low level radiofrequency (RF) radiation inside a very large TEM cell. The wave impedance of the exposures was varied by using a number of standing wave patterns created by different mismatched loads on the cell. The method works best for the E orientations and is limited to 1/2 equal to or < E/(377H) equal to or < 2. The fraction of the RF absorption rate attributable to each of the electric and magnetic fields is determined by a graphical method. For the E orientations and frequencies from 7.00 to 40.68 MHz, over 90 percent of the RF absorption rate (on average) was attributable to the electric field. This result applies to both E orientations (EKH and EHK) under both free-space and grounded conditions. It also agrees with the quasi-static caluclation for the prolate spheroid model of a human.
Report Number
891 —
Date of publication
15 Sep 1984
Number of Pages
24
DSTKIM No
85-00997
CANDIS No
45820
Format(s):
Hardcopy;Originator's fiche received by DSIS

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